So this brings me to another question. If you take off using TO-1, and you encountered "Windshear! Windshear!" at V1. What will you do? I was thinking that on contaminated runways or other situations when V1 was reduced, the V1/Vr spread is larger and the exposure to this scenario can be significant. Are my worries without a cause?
Simple solution .. if you continue, you consider/do firewall(ing) the levers ...
(a) the risk of dying due serious windshear is real and staring you in the face
(b) the risk of then having an engine failure and departing .. is far smaller
(c) if you've already had the failure and then get the windshear ... it just wasn't your sort of day and you are probably best positioned to take your chances in the overrun.
... first, attend to the thing which is going to kill you first ... noting that, if it succeeds, then the next threat doesn't even get the chance to try ...